Direct methanol fuel cells with streamline graded structure under ultra-low fuel stoichiometry condition

Seunghun Jung, Chao Yang Wang

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Operating a direct methanol fuel cell (DMFC) with ultra-low fuel stoichiometry is desirable to build a compact portable power system. Through 3D computational modeling with statistical analysis, severe non-uniformity of fuel concentration leading to high methanol crossover in the inlet region and poor fuel supply in the outlet region is predicted under ultra-low fuel stoichiometry condition, which causes large voltage loss or even cell shut-down. After identifying controlling parameters of methanol transport, this paper proposes streamline-graded structures (SGS) of the anode channel to mitigate anode fuel distribution non-uniformity and to boost cell performance and fuel efficiency together. Computational results show that streamline-graded structures achieve about 10% of voltage gain and 3% of fuel efficiency improvement compared to the conventional DMFC design by mitigating anode non-uniformity.

Original languageEnglish (US)
Pages (from-to)253-264
Number of pages12
JournalJournal of Power Sources
Volume248
DOIs
StatePublished - Jan 1 2014

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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